Commuter service between Baltimore and Washington, D.C., operating 77 daily trips in the Baltimore-Washington corridor, eight Maryland counties and northeastern West Virginia on the Penn, Camden and Brunswick lines. 1-800-325-RAIL (1-800-325-7245)www.mtamaryland.com

Subway

Baltimore's Metro Subway operates from Owings Mills, through Downtown Baltimore, to the Johns Hopkins Hospital. Service is provided from 14 stations and operates every eight minutes during rush hour, every 10 minutes during the day, and every 10 to 20 minutes on evenings and weekends. Basic fares are $1.60 one way, or a $3.50 Day Pass for unlimited daily trips on Maryland Transit Administration Metro Subway.1-866-RIDE-MTA (1-866-743-3682), www.mtamaryland.com

Above-ground railway operates every day in nine- to 17-minute intervals, with 32 stops from Hunt Valley, through Downtown Baltimore, and south to Glen Burnie. Special stops at BWI Airport , Amtrak's Penn Station-Baltimore, and the Camden Yards sports complex. Basic fares are $1.60 one way, or a $3.50 Day Pass for unlimited daily trips on Maryland Transit Administration Light Rail. 1-866-RIDE-MTA (1-866-743-3682), www.mtamaryland.com